VirtualKim vs Enigma Operator

The 6502 microprocessor changed the world. Released in the 1970’s, it was the reason that home computers were within the reach of many hobbyists. This app re-creates the 6502 CPU and some of the hardware that used it. This isn't a game (although games are included), this is an emulation of the 8-bit processor, complete with an assembler and some programming puzzles to solve. Start with the most basic user interface you can imagine - six 7-segment LEDs and some buttons - to enter, debug and run your applications. Then upgrade to a display and keyboard, and use the built-in monitor program to dump memory, makes edits and execute your code. Can you run BASIC? Maybe. FORTH? Perhaps. Assembler? Definitely! Don't think of this as a something "fun" or "enjoyable" in the traditional sense. Think of it as a puzzle: how on earth did those folks in the 1970's manage to do ANYTHING when computers were this basic? Documentation is provided, but to get the most of out of this app you'll need to do your own research. Just like in the 1970s. Features - KIM-1 keypad/LED mode simulator. - KIM-1 serial terminal mode simulator. - Apple 1 serial terminal mode simulator. - Multiple programs including Life, Mastermind, word games, Trek, and more. - Working 6502 Assembler with single-step, memory and register view. - A comprehensive 6502 tutorial system with interactive lessons and reference material. - Shareware! All features are always available without a purchase.

In 1943, the most secret messages in the world were locked by a machine with 159 quintillion settings. Now it fits in your pocket. Enigma Operator is a complete, historically faithful simulation of the two most famous cipher machines of the Second World War: the three-rotor Enigma I used by the German Army and Air Force, and the four-rotor Enigma M4 carried aboard the U-boats. Every rotor wiring, every reflector, even the machine's famous double-stepping quirk is reproduced exactly - verified against the historical test vectors. If it happened on the real machine, it happens here. YOU DON'T JUST PRESS BUTTONS. YOU OPERATE THE MACHINE. Open the lid and lift real rotors out of their box. Hear the most satisfying click of the real machine keystrokes. Set the ring positions. Plug the cords into the Steckerbrett. Scroll the windows to the day's ground setting and watch the signal race through a live wiring diagram with every key you press. Then sit down at the captain's desk, where the actual documents of the Kriegsmarine cipher system are waiting: daily key sheets, the Kenngruppenbuch, bigram tables, the Tauschtafelplan, allocation lists - all of them real, all of them working, all of them needed. NEVER TOUCHED A CIPHER MACHINE? PERFECT. A step-by-step interactive tutorial starts with a battery and a lightbulb and ends with you performing the complete, authentic Kriegsmarine decryption procedure by hand - the same document chain a U-boat radioman worked through in 1943. No experience needed. Just curiosity. ALREADY KNOW YOUR ROTORS FROM YOUR REFLECTORS? This is the deep simulation you've been looking for. Era-accurate procedures from 1937 to 1943, including the doubled message keys the Polish cryptanalysts exploited, the Kenngruppen system, M3/M4 compatibility, and the operator shortcuts Bletchley Park called "cillies" - because the weak link in the chain was always the human element. SOMETHING NEW EVERY DAY - DAILY DECRYPT: one fresh intercept each day, for each machine, drawn from thousands of authentic daily keys. Same puzzle for everyone every day. - SEND IT!: one message to encrypt each day - compose the full transmission yourself, preamble and all, exactly by the book. - TICK TOCK SETUP: race the clock to rig the machine from a real key sheet. - PROTOCOL PUZZLES: nine hand-built mysteries of garbled signals, lazy operators, and impossible indicators. Deduce what went wrong using nothing but the documents on your desk - with a pair of rhyming hints if you're stuck, and a secret or two for those who solve them all. ALSO ABOARD - A working notepad that keeps your worksheets - Best times for every challenge - Atmospheric sound, from the machine's keys to the hum of the boat -all optional - Fully offline. No ads. No accounts. No data collected. Nothing between you and the machine. Eighty years ago, breaking this machine took the best minds of a generation. Setting it up correctly took a nineteen-year-old with cold hands and a codebook. Tonight, both jobs are yours.